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Question
Write balanced equation reaction of sodium hydroxide solution with iron (III) chloride solution.
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Solution
Adding sodium hydroxide solution dropwise to FeCl3 produces a reddish coloured ppt that is insoluble in excess NaOH.
\[\ce{\underset{(yellow)}{\underset{Ferric chloride}{FeCl3}} + \underset{(colourless)}{\underset{Caustic soda}{3NaOH}} -> \underset{(reddish brown ppt{.})}{\underset{Ferric hydroxide}{Fe(OH)3↓}} + \underset{(colourless)}{\underset{Sodium chloride}{3 NaCl}}}\]
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